Albr-hcotob



s. TRIDICO, v

AIR MOTOR.

APPLICATION FILED AUG-24. 1918- v 1 3 1 3, 84:2 Patented Aug. 19, 1919.

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SALVATORE TRDICO, OF BROOKLYN, NEW YORK.

AIR-MOTOR.

Specification of Letters Patent.

Patented Aug. 19, 1919.

Application filed August 24, 1918. Serial No. 251,218.

To all whom it may concern:

Be it known that I, SALVATORE TRInIoo, a subject of the King of Italy, a resident of Brooklyn, in the county of-Kings and State of New York, have invented certain new and useful Improvements in Air-Motors, of which the following is a specification.

This invention relates to motors, and more particularly to a motor of the fluid actuated ty e.

)ne of the main objects of the invention is to provide a motor of relatively light and durable construction specially adapted for operating light drills and similar tools, this motor being free of all projections such as would interfere with manual manipulation of the same. i

A'further object is to provide a motor in which the pressure fluid for operating the same may be admitted axially of the motor casing, the means for admitting this pressure fluid constituting a gripping element or handle for manipulation of the motor as a whole.

Another object is to provide a motor the speed of rotation of which may be accurately regulated and varied within comparatively wide limits.

Further objects will tailed description.

In the drawings:

Figure 1 is a central sectional view through a motor constructed in accordance with my invention.

Fig. 2 is a similar view of a modified form.

appear from the de- Fig. 3 is a detail of the front clols ure disk.

for the motor casing.

Fig. 4 is a front View of the motor with the front closure disk removed, showing the relation of the blades or teeth of the two elements of the rotor.

Fig. 5 is a fragmental detail section through the handle and the means for connecting the motor to a source of supply of pressure fluid.

In constructing the motor I employ a cylindrical casing 1 the back of whieh'is closed by a relatively thick portion of the casing as designated at 2. The front of this casing is closed by a relatively heavy flanged disk -3 which is detachably secured in place by machine screws, or in any other suitable manner, this disk and the adjacent peripheral portion of the casing being ra'bbeted to insure a fluid-tight closure. The front disk 3 is provided with a projecting neck 4 which is ed to receive a packing nut 5, the neck and this nut constituting a packing gland through which projects a shaft 6 carried by the rotor designated generally by 7. This shaft constitutes a spindle to the outer end of which may be secured a drill or any other tool which it is desired to use, in any suitable manner.

The rotor is provided, at the central portion of each end, with a threaded neck 8 which receives a cone collar 9 threaded thereon, this collar coactin with a concentric cone collar 10 mounteg in the adjacent end disk of the casing to provide a raceway for bearing balls 11. The rotor is thus mounted within the casing on ball bearings so as to reduce friction to a minimum and insure ready rotation of this rotor.

As will be noted more clearly from Fig. 1 of the drawings, the rotor 7 is provided with a central peripheral channel or groove which receives a packing ring 12 of any suitable or usual construction, this ring fitting snugly the interior of the casing so as to form a fluid-tight closure therewith. The channel for receiving packing ring 12 serves to divide the rotor 7 into two elements or sections 7 and 7". The inner or rearward section 7 of the rotor is cut to provide a plurality of teeth or blades 13 which are of substantially flattened V-shape, these blades being disposed tangentially to the rotor. The outer or forward section 7 is provided with a plurality of teeth 13 which are formed similarly to the teeth 13 but disposed oppositely thereto. Back portion 2 of the casing is provided with :1 diametric bore or duct 14 which communicates with a nipple 15 secured in this disk at the center thereof. This nipple is exteriorly threaded at its outer end to receive a coupling nut 16 engaging over a peripheral flange 17 provided at the inner end of a corrugated tubular member 18. This tubular member tapers outwardly in the Well known manner and is adapted to receive the end portion of a flexible'hose 19 inserted thereover. The tubular member 18 is preferably inclosed by a member 20 of wood or other suitable material properly shaped so as to be readily grasped, this member being provided with a central bore to accommodate the flexible hose or tube 19. The member 20 and tubular member 18 thus constitute a central outwardly exteriorly threadhandle which is detachably secured to the casing 1 by means of nipp e 15 so as to facilitate ready manipulation of the motor. As will be noted, this handle projects axially of the casing, the pressure fluid which is supplied through tube 19, it being understood that this tube is connected to ansuitable source of Supply of pressure fluid, being admitted to the casing at the central portion thereof thus eliminating all unnecessary projections such as would interfere with ready manipulation of the motor.

The casing l is provided with two inlet ducts 21 and 22 in its peripheral wall which extend forwardly from the opposite ends of the main inlet duct 14. Duct 21 communicates directly with inlet ports 23 which open into the rearward portion of the rotor chamber adjacent thesection 7 of the rotor, duct 22 being in communication with inlet ports 24 which open into the section of the rotor chamber containing sectlon 7 of the rotor. As will be noted more clearly from Fig. 4 of the drawings, the inlet ports 24 are directed at a tangent to the rotor so that the pressure fluid, as it is discharged through the inlet ports, impinges upon the operating faces of the blades or teeth 13 of rotor sections 7 at a. decided angle so as to impart a forward impulse to the rotor thus causing rotation thereof at relatively high speed. The pressure fluid, which is admitted through the inlet ports 24, is discharged from between the teeth or blades through exhaust ports 25 provided through the front disk 3 at a point remote from the inlet ports. A suflicient number of these exhaust ports are provided to insure proper discharge of the pressure fluid and eliminate all possibilit of back pressure. When the pressure uid is admitted to rotor section 7 through the inlet ports 23, the rotor will be driven in the opposite direction, the pressure fluid being discharged through the exhaust ports 26 provided through the'back portion 2 of the casing. By admitting the pressure fluid to either section of the rotor, selectively, the rotor may be driven at relatively high speed in either direction desired.

To permit control of flow of pressure fluid through the rotor, a cylindrical control valve 27 is threaded into each'end of the inlet duct 14, this valve being of such length as to completely close the supplemental inlet port when turned into" its innermost 0- sition. Each of the valves 27 is provided with a reduced stem 28 at the outer end of which is secured a knurled head 29 for turning the valve. A set screw 30 is threaded into back disk 2 so as to engage the valve 27 and lock it"securely in adjustment. By turnin either of the valves in proper direc-- tion, tie flow of pressure fluid to either section of the rotor, andconsequently the speed of rotation of the rotor in either direction desired, can be accurately regulated. Also, the rotor can be driven at very low speed, when necessary or desired, by opening the valves 27 to different degrees so as to admit more pressure fluid to one section of the'rotor than to the other. The rotor will be turned or rotated at very low speed if the valves are opened to nearly an equal degree, the direction of rotation depending upon which valve is open to the greater extent. Obviously, by properly manipulating the valves, the rotor can be caused to rotate at. very low speed in either direction. By this arrangement, a very wide range in speed of rotation is possible so as to readily adapt the motor to the conditions under which it is to be used.

In the modified form illustrated in Fig. 2, the rotor 7 is replaced by a rotor 7 which corresponds to one of the sections 7 a or 7 b of the rotor used in the preferred form of the invention. Also, the back portion 2 is provided with an inlet duct 14 extending from the center thereof which communicates at its outer end with the supplemental inlet duct 21 and the inlet ports 23. This motor is well adapted for use where a very light motor is desired, and it is essential to reduce weight to a minimum, and where it is not necessary to reverse the direction of rotation of the tool. In all other respects, the construction'of this modified form is similar to that of the preferred form of my invention.

It will be evident that there may be slight changes made in the construction and arrangement of the details of my invention without departing from the field and scope of the same, and I intend to include all such variations, as fall within the scope of the appended claims, in this application in which a preferred form only of my invention is disclosed.

What I claim is;

1. In a motor of the character stated, a casing provided with front and back closed end portions, a rotor mounted within said casing and fitting snugly the interior thereof, a packing ring secured about said rotor at the central portion thereof and fitting snugly the interior of the casing so as to divide the rotor chamber into two separate compartments, the rotor at one side of said ring being provided with a plurality of tangentially disposed outwardly projecting blades and having, at the other side of the ring, a plurality of similarly disposed and oppositely directed blades, said back end portion being inlet duct at the central portion thereof, and fluid pressure control valves threaded in the ends of the main inlet duct for controlling flow of pressure fluid therefrom into said supplemental inlet ducts.

2. In a motor of the character stated, a casing provided With front and back closed end portions, a rotor mounted Within the casing and fitting snugly the interior thereof, said rotor being provided with a plurality of outwardly projecting blades, said back end portion of the casing being provided With'a pressure fluid inlet duct extending from the center thereof and communicating with the rotor chamber through a peripheral wall of the casing, means secured to the back end portion of the casing at the central portion thereof for connecting a source of supply of pressure fluid to the casing in communication with the said inlet duct, said means constituting a handle for manipulation of the motor and a fluid pressure control valve mounted on the casing for controlling the flow of pressure fluid through said inlet duct.

Signed at New York, in the county of New York and State of New York, this 23rd day of August, A. D. 1918.

SALVATORE TRIDICO.

WVitnesses:

FRED HAsrEL, FREDERICK UNGEHEUER. 

